ADVENTURES INTO THE UNKNOWN was the earliest continuously published horror comic book. This particular story is from one of the later issues. The story was probably written by editor Richard Hughes under one of his many pen names. Art is credited to Sal Trapani.

STRANGE TALES had a lot of monster stories in this period. A lot of them were done by Jack Kirby. This time he doesn't even seem to have gotten credit, but then, Marvel never did give him enough credit for everything.